Question submitted by Sam Ottley 11/07/2012 – 1 Response.
What is the difference between polypropylene and polyethylene, and how should this affect my decision making when selecting container storage?
High Density Polyethylene (HDPE) is best for lower temperatures and has a range from – 40ºC to 40ºC, making it ideal for food and hygienic applications. High Density Polyethylene is a common material for detergent bottles and garbage containers.
Polypropylene (PP) is a durable and robust material with a temperature range from -20ºC to 60ºC. Examples of polypropylene products include packaging materials and plastic stationery. The choice of material you would select is dependent on the required application.
In industrial container applications therefore people storing foodstuffs in coldstores may prefer Polyethylene, but Baking Trays for example are often in Polypropylene. In most warehousing applications however, at ambient temperature, there is no practical advantage in either material – except that when handling them you will find that Polypropylene Containers are quieter. They make less noise under impact which can be of significance in a large warehouse if you have hundreds of them trundling along a roller conveyor.